typo fix

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1729 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/jcode.rb

@@ -9,7 +9,7 @@ class String
   printf STDERR, "feel free for some warnings:\n" if $VERBOSE
 
   def _regex_quote(str)
-    str.gsub(/[][\\]/, '\\\\\&)
+    str.gsub(/[][\\]/, '\\\\\&')
   end
   private :_regex_quote